One way I like to freeze extra food I have either cooked or leftover, is to make up "TV" dinners. I have plastic trays which have several slots and I place a piece of meat, which might be leftover from a supper and then freeze it.
Then the next time I might have leftover potatoes, which I place in the same container; vegetables, desserts, etc.
This way when I am in a hurry, I just pull one or two out for a real quick dinner. That makes quick work or no work out of suppertime.
You may also use the vegetables and fruits you have harvested, especially if you don't can them.
Another way to use up leftovers or the harvest is to cook them and if vegetables place them in a big container in your freezer. Then when it is time to make soup on one of the cold winter days, you will have a good start on the vegetables you need. You might have to add a few other items, which don't freeze well, but it is all cooked and just need to be reheated.